

.dragwidthcomBox {
    height: 100%;
    display: flex;
}
.dragwidthcomBox .left{
    flex-basis: 300px;
}
.dragwidthcomBox .line{
    flex-basis: 2px;
    cursor:e-resize;
    background-color: #CCC;
}
.dragwidthcomBox .right{
    flex: auto;
}
